''All good poetry is the spontaneous overflow of powerful feelings: it takes its origin from emotion recollected in tranquillity.''

William Wordsworth (1770-1850), British poet. Lyrical Ballads, preface, 2nd edition (1801).
This sentiment, which is a central tenet in Wordsworth's criticism, has parallels in Schiller, Ueber Bürgers Gedichte, as well as Coleridge's Notebooks, in which he speaks of "recalling passion in tranquillity."

''The human mind is capable of excitement without the application of gross and violent stimulants; and he must have a very faint perception of its beauty and dignity who does not know this.''

The Trosachs

THERE 's not a nook within this solemn Pass, But were an apt confessional for one Taught by his summer spent, his autumn gone, That Life is but a tale of morning grass Wither'd at eve. From scenes of art which chase That thought away, turn, and with watchful eyes Feed it 'mid Nature's old felicities, Rocks, rivers, and smooth lakes more clear than glass Untouch'd, unbreathed upon. Thrice happy quest,